Samson 3730 Series - Positioner attachment

5-6 EB 8384-3 EN
Installation
5.5 Positioner attachment
5.5.1 Direct attachment
a) Type3277-5 Actuator
Î Required mounting parts and accesso-
ries: Table 5-5
Î Observethetraveltableonpage5-5.
Actuator with 120cm² (see Fig.5-5)
Depending on the type of positioner attach-
ment, the signal pressure is routed either left
or right of the yoke through a hole to the ac-
tuator diaphragm. Depending on the fail-
safe action of the actuator "actuator stem ex-
tends" or "actuator stem retracts" (valve clos-
es or opens upon supply air failure), the swi-
tchoverplate(9)mustrstbeattachedtothe
actuator yoke. Align the switchover plate
with the corresponding symbol for left or
right attachment according to the marking
(view looking onto the switchover plate).
1. Mount connecting plate (6) or pressure
gauge bracket (7) with pressure gauges
on the positioner. Make sure that the two
seals (6.1) are seated properly.
2. Remove screw plug (4) on the back of
the positioner and seal the signal pres-
sureoutput(38)ontheconnectingplate
(6) or on the pressure gauge bracket (7)
with the stopper (5) included in the ac-
cessories.
3. Place follower clamp (3) on the actuator
stem, align it and screw tight so that the
mounting screw is located in the groove
of the actuator stem.
4. Mount cover plate (10) with narrow side
of the cut-out (Fig.5-5, on the left) point-
ing towards the signal pressure connec-
tion. Make sure that the gasket (14)
points towards the actuator yoke.
5. 15mm travel: Keep the follower pin (2)
on the M lever (1) on the back of the po-
sitioner in the pin position 35 (delivered
state).
7.5 mm travel: Remove the follower pin
(2) from the pin position 35, reposition it
in the hole for pin position 25 and screw
tight.
Whiledoingso,holdtheleverinthe
middle to ensure that it does not rest at
the end stops.
6. Insert molded seal (15) into the groove of
the positioner housing and insert the seal
(10.1) on the back of the housing.
7. Seal the signal pressure output at the
back with the screw plug (4, order no.
0180-1436)andtheassociatedO-ring
(order no. 0520-0412).
8. Place positioner on the cover plate (10)
in such a manner that the follower pin
(2) rests on the top of the follower clamp
(3). Adjust the lever (1) correspondingly
and open the positioner cover to hold the
positioner shaft in position at the cap or
rotary pushbutton. The lever (1) must rest
on the follower clamp with spring force.
Fasten the positioner on the cover plate
(10) using the two fastening screws.
9. Mount cover (11) on the other side.
911
Supply 9 Output 38
5
6
4
7
6
10
10.1
3
2
1
15
6.1
1.1
1.2
14
8
Symbols
Actuator stem
extends
Actuator stem
retracts
Left attachment Right attachment
Switchover plate (9)
Marking
Signal pressure
input for left
attachment
Signal pressure
input for right
attachment
Cut-out of
cover plate
NOTICE
!
Only use the connecting plate (6) in-
cluded in the accessories to connect
supply and output.
Never screw threaded parts directly
into housing.
1 Lever
1.1 Nut
1.2 Disk spring
2 Follower pin
3
Follower clamp
4
Screw plug
5 Stopper
6 Connecting plate
6.1 Seals
7 Pressure gauge bracket
8 Pressure gauge mounting
kit
9 Switchover plate
(actuator)
10 Cover plate
10.1 Seal
11 Cover
14 Gasket
15 Molded seal
Fig.5-5: Direct attachment – Signal pressure connection for Type 3277-5 Actuator with 120 cm²